102131256211 has 2 divisors, whose sum is σ = 102131256212. Its totient is φ = 102131256210.

The previous prime is 102131256193. The next prime is 102131256233. The reversal of 102131256211 is 112652131201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 102131256211 - 2¹¹ = 102131254163 is a prime.

It is not a weakly prime, because it can be changed into another prime (102131256511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51065628105 + 51065628106.

It is an arithmetic number, because the mean of its divisors is an integer number (51065628106).

Almost surely, 2^102131256211 is an apocalyptic number.

102131256211 is a deficient number, since it is larger than the sum of its proper divisors (1).

102131256211 is an equidigital number, since it uses as much as digits as its factorization.

102131256211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 25.

Adding to 102131256211 its reverse (112652131201), we get a palindrome (214783387412).

The spelling of 102131256211 in words is "one hundred two billion, one hundred thirty-one million, two hundred fifty-six thousand, two hundred eleven".